Bipartite intake manifold for v-engines



Aug. 17, 1954 M. L. CARPENTIER ETAL 2,636,506

BIPARTITE INTAKE MANIFOLD FOR V-ENGINES Filed April 19, 1952 3 Sheets-Sheet l vrlvsifv 1% .6 @MM 2, m? M w. W M 2 W Z i Ma A 7, 1954 M. L. CARPENTIER ETAL 2,686,505

BIPARTITE INTAKE MANIFOLD FOR V-ENGINES I :s Sheets-Sheet 2 Filed 'April 19, 1952 w v m m if s. w/f a 1 7 m1. W .4 W 7 M w Aug. 17, 1954 M. L. CARPENTIER ETAL 2,685,506

BIPARTITE INTAKE MANIFOLD FOR V-ENGINES Filed April 19. 1952 I: Sheets-Sheet 3 Patented Aug. 17, 1954 BIPARTITE INTAKE MANIFOLD FOR V-ENGINES Melbourne L. Carpentier, Detroit, and William E. Drinkard, Birmingham, Mich, assignors to Chrysler Corporation, Highland Park, Mich, a

corporation of Delaware Application April 19, 1952, Serial No. 283,198

11 Claims. 1

This invention relates to intake manifold structures for v-type engines and especially for V-8 engines providing dual or multiple carburetion.

Our invention will be described by way of illustration only as applied to a form of intake manifold of current manufacture for V-8 engines which is fed by a dual-barreled carburetor and wherein each barrel of the carburetor serves to feed two inner cylinders of one bank of the engine and two outer or end cylinders of the other bank of the engine.

Manifold structures of this character have heretofore been difficult and costly to make because they have necessitated the use of complex patterns requiring multi-layered cores which are difficult to support, to produce them. Moreover, the problems faced in using such patterns in preparing the casting molds, are such that only a few foundries have the expert personnel and equipment necessary to cope with the situation and could handle the casting of these manifolds.

The principal object of our invention is to overcome the foregoing problems and difficulties and provide a satisfactory manifold structure that may be made by the use of simple patterns which do not require specialized handling and that may be cast by any foundry.

Another object is to provide a manifold structure for V-8 engines in which the fuel-air i. e., gas-conducting passages of complex and tortuous shape can be produced without casting difficulties.

Another object is to provide a bipartite manifold for V-8 engines capable of easy assembly and which assembled structure not only has the rigidity and efiiciency of an integral manifold having similar passages, but also has improved passage structure.

Further objects and advantages of our invention will be more apparent as this specification progresses, reference being had to the accompanying drawings in which:

Fi ure 1 is an end elevational view partly in section of an 8 cylinder V-type overhead valve engine embodying our invention;

Figure 2 is a plan view of the assembled bipartite manifold of our invention;

Figure 3 is a side elevational view of the assembled bipartite manifold of Figure 2;

Figure 4 is a sectional elevational view of the manifold of our invention taken at 44 of Figure 2 and showing a portion of a dual carburetor in position thereon over the manifold riser passages;

Figure 5 is a side elevational section of the bipartite manifold structure of our invention taken at 5-5 of Figure 2;

Figure 6 is a plan view of the uppermost or top section of the bipartite manifold structure of Figure 2;

Figure 7 is a plan view of the underlying or lower section of the bipartite manifold structure of Figure 2; v

Figure 8 is an exploded cross sectional elevation taken on the line 4-4 of Figure 2 showing the parts of the manifold structure of our invention; and

Figure 9 is a plan view of the gasket for sealing the mounting joint between the two manifold sections and shown in Figure 8.

Referring now to the drawings wherein similar numerals are used to designate similar parts of the bipartite manifold structure of our invention, we have illustrated our invention as applied to a V-3 engine of current manufacture which comprises, as shown in Figure l, angularly-arranged banks of cylinders It provided in cylinder blocks ll. Secured to each cylinder block is a cylinder the longitudinal axis of the engine at a substan-' tially wide angle to each other, for instance and on a great arc of the spherical segment forming the combustion chamber.

The inlet and exhaust valves of both banks are operated from a single camshaft 20 located above the crankshaft It, by rocker arms 2| and 22 respectively, and push rods 23.

As seen in Figure 1, the inlet valves it are provided in the cylinder head I2, with inlet passages 24 which connect with gas-conducting passages hereinafter referred to, of the bipartite manifold of our invention, the latter being generally designated in Figures 1 and 2, bythe numeral 25.

The exhaust valves iii are provided with exhaust passages 2% which are associated with transverse passages of the exhaust manifolds 2'! of the engine that conduct the exhaust gases from the combustion chambers.

In Figure l, the left hand exhaust manifold structur 27 is provided with a thermostatically controlled heat valve 28 which when closed while the engine is running, permits the exhaust gases of the left hand cylinder bank to be directed across the so-called hot spot portion of the inlet manifold 25 by a passage generally designated by the numeral 29 which follows a circuitous path in juxtaposition to the manifold intake gas risers so as to facilitate preheating of the gas or fuel-air mixture being conducted from a dual-barreled downdraft carburetor 38 positioned immediately above the manifold 25, to the cylinders 10 by way of the inlet valves l8.

As seen more particularly in Figures 2, 4, 6, 7, and 8, the manifold of our invention is of bipartite construction. Stated otherwise, it preferably comprises two generally horizontal, separable sections; an upper section 35 (Figure 6) and a lower section 35 (Figure 7). The section 35 has a body portion 3?, and the section 36 a body portion 38 which together form the socalled hot spot or riser body of the manifold. The body portion 31 of the upper section 35 has a portion 39 at its underside provided with a generally horizontal machined face 49 whereby this section may be secured to the lower manifold section 36 and the body 38 of the lower section 35 of the manifold is provided with a complementary or matching mounting portion 42 provided with a finished or machined horizontal face 43 which is brought into face-to-face relationship with the finished face 40 of the body portion 31 of the upper section. The sections are clamped together through an intervening sealing gasket M by means of four threaded bolts or studs 55 which extend upwardly through clearance openings or holes 45 in the body portion 38 of the lower section 35 through clearance holes or apertures 4! in the gasket 44 and are threadedly received in the body portion 37 of the upper section 35 as by the threaded or tapped holes 48.

The body portion 3'! of the upper section 35 has its top surface 50 machined to provide a horizontal mounting face or seat for the carburetor 30, the latter being secured in position as seen in Figures 1 and 2, by suitable bolts which pass through the mounting flange 52 of the carburetor and are received in suitably threaded holes 53 provided in the face 5%, a suitable gasket 54 being provided intermediate the flange 52 and the face 50.

As seen in Figure 4, the carburetor 30' is of the dual type. It is provided with separate vertical barrels or passages 54, 55 from which the gas or air-fuel mixture may be delivered to the inlet manifold under control of a throttle member 55 having throttle blades 5'! located in the passages 55, 55 and adapted to assume predetermined positions in the passages to provide any condition from fully open to a fullyclosed throttle The throttle passages 54 and 55 coincide respectively, with vertical manifold riser passages 58 and 559, with which they form continuous passages, the riser passages being formed by cylindrical walls 53 52 ,55 respectively.

It will be observed from Figures 4 and 8, that the riser passage 58 is of relatively short height and is located entirely within the body portion 31 of the upper manifold section 35, whereas the riser passage 58 is a relatively long vertical passage that extends entirely through the body portion 31 of the upper manifold section and partly into the body portion 38 of the lower manifold section 36. These riser passages 58 and 53 are, as seen in Figures 2, 6, and '7, of circular section.

Extending from opposite sides of the body 3? of the upper manifold section in a direction generally longitudinally of the engine and oblique with respect to the body portion 31 so as to be pointed toward the right cylinder bank, are generally horizontal diverging gas conduit portions 68 and Bi defining primary passages 62 and '53 respectively, which connect with the short riser passage 58 of the body portion 31 of the upper manifold section at the bottom of the passage 58. the latter providing a zone of distribution 64 for the gas. The conduit has elbow-shaped downturning portions or branches 66 and 37 providing secondary or branch passages 63 and 68 respectively, connecting with the primary passage 52 at a zone of distribution 69 The conduit branches 6% and 61, as seen in Figure 6, are oblique to the generally longitudinal axis of the engine and at substantially right angles to the conduit portion 63. The conduit portion 66 terminates at its outer end in a mounting flange ii! for attachment to the cylinder head l2 and has its passage 68 in registration with the inlet valve passage 2d of an end cylinder of the left hand cylinder bank of the engine. On the other hand, the conduit branch 6'! terminates in an elongated mounting flange 12 for attachment to the inner side face of the cylinder 12 of the right bank of the engine and so as to have its passage 55 register with the inlet valve passage 24 of an inner cylinder H) of the right hand cylinder bank.

Similarly, the conduit portion 6| connects with elbow-shaped downturning lateral or branch conduit portions M, 15 providing branch gas passages Hi and H respectively, connecting with the passage 63 of the conduit portion 5| at a distribution zone 78. Moreover, the branch conduit portion T4 terminates in a mounting flange is for securement to the inner face of the cylinder head I2 of the left cylinder bank and in a manner to have its passage 15 register with the inlet valve passage 24 of the other endmost cylinder of the left hand cylinder bank, and the conduit portion 75 terminates in the previously mentioned mounting flange '12 for the conduit portion 61 and has its passage H in registration with the inlet valve passage 24 of the other inner cylinder of the right hand cylinder bank. The mounting flanges H3, 12, i9 are secured in place on the cylinder heads by suitable means, for instance bolts, not shown.

The lower section 35 of the manifold structure has conduit portions which are in plan view substantially mirror images of the conduit portions of the upper section 35. Thus, extendin generally lengthwise of the engine and oblique to the body portion 38 of the lower section so as to point in the direction of the left cylinder bank, are diverging conduit portions 80, 8!? providing primary gas passages 81 and Bl respectively, which connect with the lower end of the riser passage 59 at a zone of distribution 85, this being seen more particularly in Figures 7 and 8. Connecting with the conduit portion 81 and at substantially right angles thereto, are generally horizontal lateral branch conduit portions 32, 83 providing branch passages 84 and 35 respectively, which connect with the primary passage 8! in a distribution zone 38. The conduit portion 82* has generally horizontal branch portions 87 and 83 at substantial right angles thereto providing branch or secondary passages 88 and 90 respectively, which connect with the primary passage as at a distribution zone 9!.

As seen in Figure '7, the conduit portions 83 and 88 terminate in independent mountin flanges BI and 92 respectively, adapted for attachment to the inner face of the cylinder head of the right hand cylinder bank by suitable securing means, not shown, and so positioned that the termini of the passages 85* and 9t coincide respectively with the inlet valve passages 24 of the endmost cylinders of the right hand cylinder bank.

The branch conduit portions 32 and 81 on the other hand, converge toward and terminate in a common mounting flange 93 which is adapted for attachment to the inner face of the cylinder head I2 of the left hand cylinder bank of the engine and is so positioned that the termini of the branch passages 84 and 89 respectively, coincide with the inlet valve passages 24 of the inner cylinders of the left hand cylinder bank of the engine.

The conduit portions of the sections are of rectangular cross section, thus providing suitable passages for the flow of the gas of the air-fuel mixture. Moreover, as seen in Figure 2, the conduit portions 69, SI of the upper section are in a different horizontal plane from, and overlie and cross the main conduit portions 80, 8i] of the lower manifold section. These conduit portions have sufficient vertical spacing to enable the parting lines 40, c3 of the two manifold sections to be obtained in a plane which does not intersect these manifold sections but is intermediate them. The branch or secondary conduit portions of each section after leaving their main conduit portions, terminate in common planes at the level of the inlet manifold passages. Because of this, the branch conduit portions of the upper section are somewhat longer than and have more bend than the branch conduit portions of the lower section.

It will be noted that the arrangement whereby the main conduit portions join their branch conduit portions at a substantially 90 angle, provides a substantially equally uniform turning condition for the air-fuel mixture at the distribution zones between the main conduit portions and the branch conduit portions.

As seen in Figures 1, 2, 3, and 4, the left hand mounting portions Ill, 93 and ls of the two sections are secured against a common cylinder head mounting face tilt of the left cylinder bank. Moreover, the mounting flange it substantially abuts lengthwise the mounting portion 93 so as to provide with the latter, a common seat and recess IUI for receiving a single mounting bolt for securing both flanges to the cylinder head. Similarly, the flanged portion l9 substantially abuts lengthwise the flanged portion 93 to pro-' vide a common mounting face and recess I 02 for receiving a single mounting bolt.

In a similar manner, the flange portions iii,

12, and 92 of the two manifold sections, lie in a commonplane and mount against a common mounting face 34 of the right hand cylinder head. The flange portions BI and 12 substantially abut lengthwise to form the common mounting recess and seat I836 for receiving a single mounting bolt and the flange portions 92 and I2 likewise substantially abut lengthwise to provide a common mounting face and recess It! for receiving a single mounting bolt.

As seen in Figures 1, 2, 4, 6, 7, and 8, the body portion 37 of the upper section is provided with a lateral conduit I I I! which turns downwardly to intersect in the mounting flange I2, and provides an exhaust gas passage I I I having an opening in the flange l2 which registers with a transverse exhaust passage H2 in the right hand cylinder head connecting with the exhaust manifold 21. Similarly, the body portion 38 of the lower manifold section has a lateral conduit projection II4 which turns down and terminates in the common mounting flange 93 and provides an exhaust gas passage II 5 whose terminus registers with a transverse exhaust passage I I2 of the left hand cylinder bank connecting with the exhaust manifold 21 of the left hand bank of the engine. The exhaust gas passages I I I, I I5 are connected, as seen in Figures 1, 4 and 8, by a circuitous passage I2Il which includes a side branch I2I, these circuitous passages being in part determined by the walls of the riser passages 58 and 59 and of the conduits 69, BI, 88, and and provide a socalled hot spot for the manifold passages 62, 63, 35, and 8M, the exhaust gases heating the aforesaid conduits and the gas flowing therethrough, in passing from the left to the right side of the engine through the passages I I2, II5, I25 and III when the valve 28 is closed.

It will be noted that the parting line 40, 43 between the upper and lower manifold sections occurs intermediate the passages II5, I20 and passage IZI and intermediate the passages III and I20 such that the lower face GI! of the upper section is substantially a mirror image of the upper face GS of the lower manifold section. The appearance of these faces is substantially like that of the gasket shown in Figure 9. It will be observed that in order to provide a connection between the portion of the gasket surrounding the riser passage 59 and the outer flange portion of the body portions of the sections, connecting webs I39 and I3I are provided in the gasket, and similar shaped webs or faces I 32, I33 are provided in the upper and lower body portions between the wall of the passage 59 and the outer walls of the body portions 31 and 38 of the main-- fold sections.

From the foregoing description of the manifold structure of our invention, it will be apparent that we have provided a bipartite construction wherein the cores necessary in casting each of the manifold sections will find support not only adjacent the termini of the branch conduits, but also at the body portion and that the unsupported length of the cores is relatively of short length and may be of any shape or form without creating difliculty in the molding and casting operations. Although our invention has been illustrated in connection with a manifold structure for a V-8 engine, it will be understood that the described features may be applied by those skilled in the art in other situations involving modification and changes in the number and shape of the manifold conduits and without departing from the letter or spirit of our invention.

We claim:

1. An. intake manifold unit for \/-type engines comprising a riser body having separable parts in abutting relationship, a plurality of gas conduits connected with said body, and means for securing the parts of said body together; there being a of said conduits overlying each other at opposite ends of said body, one each of said pairs of conduits connecting with one of said parts of said body and the others of said pairs connecting with the other part of said body.

2. An intake manifold for V-type engines comprising a riser body having separable parts in abutting'relationship, a plurality of individual gas conduits connected with said body, and means for securing the parts of said body together; there being a pair of said conduits at opposite ends of said body, one each of said pairs overlying the other, and the overlying conduit of each of said pairs being connected with one of said parts of said body While the underlying conduit of each of said pairs is connected with the other part of said body.

3. An intake manifold unit for V-type engines comprising a riser body having separable parts in abutting relationship, a plurality of independent gas conduits connected with said body, and means for securing the parts of said body to each other; there being a pair of said conduits at opposite ends of said body, each of said conduits comprising a primary passage portion in juxtaposition to said body and a pair of oppositely directed branch passage portions connecting with said primary passage portion, the primary passage portion of one conduit of each pair overlying the primary passage portion of the other, and the overlying passage portions of the conduits being connected to one of said parts of said body while the underlying primary passage portions of the conduits are connected with the other part of said body.

4. An intake manifold unit for V-type engines comprising a pair of overlying separable manifold sections, and means for securing said sections to each other, said sections each including a riser body portion and gas conduit portions extending from opposite ends of said riser body portion, the body portions of said sections each having a gas distribution passage and each conduit portion of said sections in part definin a primary passage connecting with the distribution passage of the body portion to which this conduit portion is connected and defining a pair of diverging branch passages connecting with the primary passage of this conduit portion, the parts of the conduits of one section which define primary passages overlying corrcsponding parts of the conduits of the other section and said riser body portions of said sections including cooperating mounting faces positioned intermediate the planes of the extending conduit portions of the sections, the said faces being in face-to-face relationship when the sections are secured together.

5. An intake manifold unit for \.type engines comprising a pair of overlying separable manifold sections, and means for securing said sections to each other, said sections each including a riser body portion and gas conduit portions extending from opposite ends of said riser body portion, the body portions of said sections each having a gas distribution passage and each conduit portion of said sections in part defining a primary passage connecting with the distribution passage of the body portion to which this conduit portion is connected and defining a pair of diverging branch passages connecting with the primary passage of this conduit portion, the parts of the conduits of one section which define primary passages overlying corresponding parts of the conduits of the other section and said riser body portions of said sections including complementary mounting portions intermediate the planes of the overlying and underlying parts of said conduit portions, said complementary mounting portions being in faceto-face relationship when said sections are secured together.

6. An intake manifold unit for V-type engines comprising a pair of overlying separable manifold sections, and means for securing said sections to each other, said sections each including a riser body portion and gas conduit portions extending from opposite ends of said riser body portion, the body portions of said sections each having a gas distribution passage and each conduit portion of said sections in part defining a primary passage connecting with the distribution passage of the riser body portion to which this conduit portion is connected and defining a pair of diverging branch passages connecting with the primary passage of this conduit portion, and the said parts of the conduit portions of one section which define primary passages lying in a difierent substantially horizontal plane from the said parts of the conduit portions of the other section and said sections including in their riser body portions matching generally horizontal mounting faces which are positioned in face-to-face relationship when the sections are secured together.

'7. A separable intake manifold unit for V-type engines comprising a bipartite riser body, a plurality of independent gas conduits connected with said body, and means for securing the parts of said body together, said body having a long and a short riser passage and said body being parted in a generally horizontal plane intermediate the depth of said body whereby the long riser passage is located in both body parts and the short riser passage is located in only one of said body parts, there being a pair of said conduits at each end of said body, one conduit at each end being connected with the body part defining said short riser and the other conduits being connected with the other part of said body.

8. A separable intake manifold unit for V-type engines comprising a bipartite riser body, a plurality of independent gas conduits connected with said body, and means for securing the parts of said body together, said body including a long and a short vertical riser passage and including a heat passage adjacent said riser passages and said body having a heat conduit at one side thereof and a heat conduit at the opposite side thereof each providing a passage connecting with the said heat passage of said body, said body being parted in a generally horizontal plane intermediate the depth of said body whereby said short riser passage and one of said heat conduits is located in one of said body parts and whereby the long riser passage and the other heat conduit are located in the other of said body parts, there being a pair of said gas conduits at each end of said riser body, one gas conduit at each end being connected with the body part defining said short riser and the other gas conduits being connected with the other part of said body.

9. A separable intake manifold unit for V- type engines comprising a bipartite riser body, a plurality of independent gas conduits connected with the ends of said body, a pair of heat conduits one each connected to a side of said body, and means for securing the parts of said body together; said body including a relatively short vertical riser passage, a relatively long vertical riser passage and a transverse heat passage in juxtaposition to said riser passages; one of said heat conduits being adapted for connecting said heat passage with the cylinder head of one bank of said engine and the other said heat conduit being adapted for connecting said heat passage with the cylinder head of the other bank of said engine; said riser body being parted in a generally horizontal plane intermediate the depth of said body whereby the short riser passage and one of said heat conduits is located 'in one of said body parts and whereby the other body part contains a part only of said long riser and the other of said heat conduits; there being a pair of said gas conduits at each end of said body, one gas conduit at each end being connected with the body part defining said short riser and the other of said pairs of gas conduits being connected with the other part of said body, and there being passage zones in said body parts connecting said riser passages with said gas conduits, and each of said gas conduits having a portion adapted to connect with the cylinder head of one bank of the engine adjacent an end cylinder of that bank and having another portion adapted to connect with the cylinder head of the opposite bank adjacent an inner cylinder thereof.

10. A separable intake manifold unit for V- type engines comprising a bipartite riser body, a plurality of independent gas conduits connected with the ends of said body, a pair of heat conduits one each connected to a side of said body, and means for securing the parts of said body together; said body including a relatively short vertical riser passage, a relatively long vertical riser passage and a transverse heat passage in juxtaposition to said riser passages; one of said heat conduits being adapted for connecting said heat passage with the cylinder head of one bank of said engine and the other said heat conduit being adapted for connecting said heat passage with the cylinder head of the other bank of said engine; said riser body being parted in a substantially horizontal plane intermediate the depth of said body whereby the short riser passage and one of said heat conduits is located in one of said body parts and whereby the other body part contains a part only of said long riser and the other of said heat conduits; there being a pair of said gas conduits at each end of said body, one gas conduit at each end being connected with the body part defining said short riser and the other of said pairs of gas conduits being connected with the other part of said body, and there being passage zones in said body parts connecting said riser passages with said gas conduits, and each of said gas conduits having a portion adapted to connect with the cylinder head of one bank of the engine adjacent an end cylinder of that bank and having another portion adapted to connect with the cylinder head of the opposite bank adjacent an inner cylinder thereof, and each of said conduit portions having a mounting flange at the end thereof where it connects with a cylinder head, the mounting flanges of the gas conduit portions which connect With the cylinder heads adjacent the inner cylinders being connected together to form an elongated continuous mounting flange.

11. A separable intake manifold unit for V- type engines comprising a bipartite riser body, a plurality of independent gas conduits connected with the ends of said body, a pair of heat conduits one each connected to a side of said body, and means for securing the parts of said body together; said body including a relatively short vertical riser passage, a relatively long vertical riser passage and a transverse heat passage in juxtaposition to said riser passages; one of said heat conduits being adapted for connecting said heat passage with the cylinder head of one bank of said engine and the other said heat conduit being adapted for connecting said heat passage with the cylinder head of the other bank of said engine; said riser body being parted in a substantially horizontal plane intermediate the depth of said body whereby the short riser passage and one of said heat conduits is located in one of said body parts and whereby the other body part contains a part only of said long riser and the other of said heat conduits; there being a pair of said gas conduits at each end of said body, one gas conduit at each end being connected with the body part defining said short riser and the other of said pairs of gas conduits being connected with the other part of said body, and there being passage zones in said body parts connecting said riser passages with said gas conduits, and each of said gas conduits having a portion adapted to connect with the cylinder head of one bank of the en-- gine adjacent an end cylinder of that bank and having another portion adapted to connect with the cylinder head of the oppositebank adjacent an inner cylinder thereof, and each of said conduit portions having a mounting flange at the end thereof where it connects with a cylinder head, the mounting flanges of the gas conduit portions which connect with the cylinder heads adjacent the inner cylinders being connected together to form an elongated continuous mounting flange and the said elongated mounting flanges being immediately adjacent the mounting flanges of the gas conduit portions adjacent said end cylinders, and said adjacent mounting flanges having recesses for receiving common securing members for securing said sections to said cylinder heads.

References Cited in the file of this patent UNITED STATES PATENTS 

